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Finding the Fourth Proportional to 331.60, 455.30 and 331.60

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Solution

The fourth proportional to 331.60, 455.30 and 331.60 is: 455.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    331.60 : 455.30 = 331.60 : x
  2. Step 2: Convert to fraction form
    331.60/455.30 = 331.60/x
  3. Step 3: Cross multiply
    331.60x = 455.30 × 331.60
  4. Step 4: Simplify right side
    331.60x = 150,977.48
  5. Step 5: Solve for x
    x = 150,977.48/331.60
  6. Step 6: Final answer
    x = 455.30

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.